Mystery Mansion Downhill : Who is the Assassin?

The Downhill Mansion belonged to the long-lived Fremen family. They owned it for many centuries. Now he owns Charles Charles Freeman. Ser Charles Freeman is not a bad person, his servants are happy with them, they say that he never punishes anyone in vain. But some time ago strange things begin to happen in the mansion. One of the maid Maria, goes mad, says the owner of the mansion himself, and this is confirmed by the other servants. The butler Mr. Burns begins to behave strangely. One day a few days before Mary's maid goes crazy, Serge Charles Freeman finds him near his documents, and specifically it was a hymn of the Fremen family, a small verse. As the owner himself says, all the boys of the Freeman family learn this verse from childhood and know by heart. After this incident, Sir Charles Freeman became very angry with the butler and gave him two days to collect his things and leave the mansion. But in a day the butler himself disappears and all his belongings remain untouched. Mr. Burns and the maid Maria had long met and were preparing for the wedding, but the wedding did not take place, because the day before the wedding, Mary will find Mr. Burns with her sister. And even 2 days after the disappearance of Burns, Maria herself disappears. All servants and residents of Downhill are alarmed, and then they are afraid of something, panic begins to embrace the inhabitants of the mansion ......